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Biomedical Basics

Host-pathogen interactions

  • Created by Henry Stewart Talks
Published on January 28, 2026   5 min

A selection of talks on Infectious Diseases

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The topic of host pathogen interactions will be explored through types of host microbe relationships, including mutualism, commensalism, and parasitism, and how these dynamics influence the development and evolution of infections. We will examine the strategies pathogens use to infect hosts and evade immune defenses, as well as the multi layered immune responses that counter these invasions. The lecture will discuss different infection outcomes and the co evolutionary adaptations between hosts and pathogens that shape disease and health. Finally, we will explore how understanding these complex interactions informs approaches to preventing and treating infectious diseases. Understanding host pathogen interactions is essential for exploring infectious diseases, immune responses, and therapeutic development. These interactions are dynamic and can lead to a range of outcomes from beneficial to harmful. This lecture will cover types of host microblationships, how pathogens initiate infection and evade immunity, host immune responses, and the resulting outcomes, highlighting the ongoing adaptations that drive pathogenesis and resilience. Not all host microbe relationships are antagonistic. They exist on a continuum. Mutualism benefits both host and microbe, as with gut microbiota aiding digestion, Commensalism occurs when microbes occupy the host without clear harm or benefit. Parasitism, key to pathogenic infections, benefits the microbe at the host's expense.

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